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Knee Surg Sports Traumatol Arthrosc. 2016 Oct;24(10):3346-3351. Epub 2016 Jan 6.

Joint awareness in osteoarthritis of the hip and knee evaluated with the 'Forgotten Joint' Score before and after joint replacement.

Author information

1
Department of Orthopaedic Surgery, University Hospital Saint Luc, Avenue Hippocrate 10, 1200, Brussels, Belgium. emmanuel.thienpont@uclouvain.be.
2
Department of Orthopaedic Surgery, University Hospital Saint Luc, Avenue Hippocrate 10, 1200, Brussels, Belgium.
3
Department of Orthopaedic Surgery, CHU Ambroise Paré, Mons, Belgium.

Abstract

PURPOSE:

To utilize the 'Forgotten Joint' Score (FJS), a 12-item questionnaire analysing the ability to forget the joint, for comparing preoperative status in osteoarthritic patients scheduled for total hip arthroplasty (THA) or total knee arthroplasty (TKA). Higher scores represent a better result with a maximum of 100. The hypothesis of this study was that a preoperative difference in favour of hip arthritis could eventually explain why THA is cited more often as a forgotten joint than TKA.

METHODS:

A prospective cohort study was conducted in 150 patients with either tricompartmental knee (n = 75) or hip osteoarthritis (n = 75). Patients completed FJS-12 scores preoperatively and 1 year postoperatively.

RESULTS:

A similar preoperative FJS-12 was observed for hip (22 (15)) and knee osteoarthritis (24 (17)) (n.s.). The postoperative FJS-12 score was significantly higher for THA (80 (24)) than for TKA (70 (27)) (p < 0.05). High reliability after 6 weeks was observed for the preoperative FJS-12 test-retest reliability (ICC = 0.87) in TKA. A preoperative floor effect of 15 % in THA and 0 % in TKA was found as well as a postoperative ceiling effect of 33 % in THA and 9 % in TKA.

CONCLUSIONS:

The clinical relevance of utilizing the FJS-12 as an instrument to evaluate outcome is strongly proposed for knee arthroplasty. In general, one is not aware of a healthy joint during the ADL, and it can therefore be regarded as 'forgotten'. The preoperative FJS-12 Score is a powerful tool to provide patients with clearer insights into their positive evolution after surgery. The use of the FJS-12 in THA is a topic for further research, as this study found that floor and ceiling effects limit its usefulness in studies evaluating clinical outcome in this area.

LEVEL OF EVIDENCE:

II.

KEYWORDS:

Forgotten Joint Score; Hip and knee arthritis; Patient-reported outcome; Total hip arthroplasty; Total knee arthroplasty

PMID:
26740088
DOI:
10.1007/s00167-015-3970-4
[Indexed for MEDLINE]

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